{"cve":"CVE-2017-7543","nvd":{"published":"2018-07-26T14:29:00.483","modified":"2026-06-17T01:24:34.507","status":"Modified","description":"A race-condition flaw was discovered in openstack-neutron before 7.2.0-12.1, 8.x before 8.3.0-11.1, 9.x before 9.3.1-2.1, and 10.x before 10.0.2-1.1, where, following a minor overcloud update, neutron security groups were disabled. Specifically, the following were reset to 0: net.bridge.bridge-nf-call-ip6tables and net.bridge.bridge-nf-call-iptables. The race was only triggered by an update, at which point an attacker could access exposed tenant VMs and network resources.","cvss_v4":null,"cvss_v3":{"version":"3.0","vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","score":5.9},"cwes":["CWE-362"],"references":["http://www.securityfocus.com/bid/100237","https://access.redhat.com/errata/RHSA-2017:2447","https://access.redhat.com/errata/RHSA-2017:2448","https://access.redhat.com/errata/RHSA-2017:2449","https://access.redhat.com/errata/RHSA-2017:2450"],"products":["openstack:neutron","redhat:openstack"],"source":"nvd","synced_at":"2026-10-19T20:52:03.425131697+00:00"},"epss":{"cve":"CVE-2017-7543","score":0.01838,"percentile":0.78964,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-hvxr-2fvv-c3wq","url":"https://osv.dev/vulnerability/GHSA-hvxr-2fvv-c3wq","summary":"OpenStack Neutron Race Condition vulnerability","modified":"2026-09-10T03:49:33.795227363Z","packages":[{"ecosystem":"PyPI","name":"neutron","purl":"pkg:pypi/neutron","ranges":["<7.2.0-12.1"],"fixed":["7.2.0-12.1"]},{"ecosystem":"PyPI","name":"neutron","purl":"pkg:pypi/neutron","ranges":[">=8.0.0 <8.3.0-11.1"],"fixed":["8.3.0-11.1"]},{"ecosystem":"PyPI","name":"neutron","purl":"pkg:pypi/neutron","ranges":[">=9.0.0 <9.3.1-2.1"],"fixed":["9.3.1-2.1"]},{"ecosystem":"PyPI","name":"neutron","purl":"pkg:pypi/neutron","ranges":[">=10.0.0 <10.0.2-1.1"],"fixed":["10.0.2-1.1"]}]},{"id":"PYSEC-2026-686","url":"https://osv.dev/vulnerability/PYSEC-2026-686","summary":"OpenStack Neutron Race Condition vulnerability","modified":"2026-07-21T08:45:08.167191688Z","packages":[{"ecosystem":"PyPI","name":"neutron","purl":"pkg:pypi/neutron","ranges":["<7.2.0-12.1",">=8.0.0 <8.3.0-11.1",">=9.0.0 <9.3.1-2.1",">=10.0.0 <10.0.2-1.1"],"fixed":["7.2.0-12.1","8.3.0-11.1","9.3.1-2.1","10.0.2-1.1"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}